ABB Bailey DCS System – Trusted Distributed Control for Critical Industrial Operations
The ABB Bailey DCS System is one of the most widely adopted and time-tested distributed control systems for process industries worldwide. Originally developed by Bailey Controls and later acquired by ABB, the Bailey DCS family—including Net 90 and INFI 90—has become an industry benchmark for stability, reliability, and long-term operational excellence.
Built for large-scale and mission-critical facilities, the ABB Bailey DCS ensures efficient monitoring, regulation, and optimization of complex industrial processes. Many plants across oil & gas, petrochemical, power generation, steel, chemical, and manufacturing sectors continue to depend on Bailey DCS due to its robust design and unmatched durability.
⭐ Key Features of ABB Bailey DCS
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High reliability and minimal downtime
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Modular and expandable architecture
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Long lifecycle support and rugged hardware
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Redundant controllers and communication modules
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Seamless integration with existing legacy systems
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Real-time monitoring and advanced control algorithms
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Large I/O capability for complex plant operations
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Powerful engineering and configuration tools
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Compatibility with ABB Symphony, Harmony, and modern ABB platforms
🔧 Core Components of ABB Bailey DCS
1. INFI 90 Distributed Control System
The most popular and enduring Bailey system, known for robust operation.
Key Modules:
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INFI 90 Processors
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I/O Modules
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Communication Gateways
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Power and Redundancy Units
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Human Interface Stations (HIS)
2. NET 90 Control System
A predecessor to INFI 90, still used in many plants for stable and continuous control.
Highlights:
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Reliable network communications
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High fault-tolerance
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Legacy support by ABB
3. Controllers and Processors
Bailey controllers manage process logic, sequence control, PID loops, and advanced operations.
Popular processors include:
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BRC 410 / BRC 300
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MPC 240 / MPC 1600
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NTA & NCI Communication Modules
4. Human-Machine Interface (HMI / HIS)
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Intuitive graphics
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Alarm management
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Trending and historical data
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Multi-level security
5. I/O Modules
Supports analog, digital, high-speed, and specialty inputs/outputs.
📌 Advantages of ABB Bailey DCS
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Proven field performance for decades
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Reliable operation in harsh industrial environments
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Long-term spare parts availability
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Strong global service support
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Highly stable system architecture
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Ideal for continuous process control
🛠 Applications of ABB Bailey DCS
Widely used in industries such as:
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Power Generation (Thermal, Nuclear, Hydro)
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Oil & Gas
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Petrochemical & Refining
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Steel & Metallurgy
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Chemical Plants
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Water & Wastewater Treatment
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Cement & Mining
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Fertilizer & Pharmaceutical Plants
💼 Why Industries Still Rely on ABB Bailey DCS?
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Exceptional durability and performance
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Cost-effective lifecycle management
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Easy system migration to ABB Symphony Plus
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Supports both legacy and modern automation needs
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Trusted by global industries for over 30 years